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A058262 a(n) is the quotient obtained when totient of primorial (product of p-1 values) is divided by LCM of the same p-1 values; p=Prime[n],..,Prime[n]. Identical LCM values are permitted. 0
1, 1, 2, 4, 8, 96, 384, 2304, 4608, 18432, 552960, 19906560, 796262400, 33443020800, 66886041600, 267544166400, 535088332800, 32105299968000, 2118949797888000, 148326485852160000, 10679506981355520000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..20.

EXAMPLE

n=7, LCM[2-1,3-1,5-1,7-1,11-1,13-1,17-1] =LCM[1,2,4,6,10,12,16]=240 Phi(2.3.5.7.11.13.17)=Phi(510510)=92160=A005867(8) a(7)=92160/240=384

CROSSREFS

Cf. A000010, A002110, A005867, A003418.

Sequence in context: A068664 A199166 A018605 * A018640 A018658 A018666

Adjacent sequences:  A058259 A058260 A058261 * A058263 A058264 A058265

KEYWORD

nonn

AUTHOR

Labos Elemer, Dec 06 2000

STATUS

approved

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Last modified December 20 19:24 EST 2014. Contains 252289 sequences.